<template>
  <div class="form-editor-container">
    <div class="left-board">
      <div class="logo-wrapper">
        <div class="form-editor-logo">流程表单</div>
      </div>
      <el-scrollbar class="left-scrollbar">
        <!-- 左边：表单项 -->
        <div class="components-list">
          <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
            <div class="components-title">
              <svg-icon icon-class="component" />
              {{ item.title }}
            </div>
            <draggable class="components-draggable" :list="item.list"
              :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
              :clone="cloneComponent" draggable=".components-item" :sort="false" @end="onEnd">
              <div v-for="(element, index) in item.list" :key="index" class="components-item"
                @click="addComponent(element)">
                <div class="components-body">
                  <svg-icon :icon-class="element.__config__.tagIcon" />
                  {{ element.__config__.label }}
                </div>
              </div>
            </draggable>
          </div>

          <!-- 左边：动态表单 -->
          <el-form ref="form" :model="form" :rules="rules" label-width="80px">
            <el-form-item label="表单名" prop="name">
              <el-input v-model="form.name" placeholder="请输入表单名" />
            </el-form-item>
            <el-form-item label="流程分类" prop="category">
              <el-select v-model="form.category" placeholder="请选择流程分类" clearable
                style="width: 100%">
                <el-option v-for="dict in categoryDictDatas" :key="dict.value" :label="dict.label"
                  :value="dict.value" />
              </el-select>
            </el-form-item>
            <el-form-item label="开启状态" prop="status">
              <el-radio-group v-model="form.status">
                <el-radio v-for="dict in this.getDictDatas(DICT_TYPE.COMMON_STATUS)"
                  :key="dict.value" :label="parseInt(dict.value)">{{ dict.label }}</el-radio>
              </el-radio-group>
            </el-form-item>
            <el-form-item label="备注" prop="remark">
              <el-input type="textarea" v-model="form.remark" placeholder="请输入备注" />
            </el-form-item>
          </el-form>
        </div>
      </el-scrollbar>
    </div>

    <div class="center-board">
      <div class="action-bar">
        <el-button icon="el-icon-check" type="text" @click="save">保存</el-button>
        <!--        <el-button icon="el-icon-video-play" type="text" @click="run">-->
        <!--          运行-->
        <!--        </el-button>-->
        <el-button icon="el-icon-view" type="text" @click="showJson">
          查看json
        </el-button>
        <el-button icon="el-icon-download" type="text" @click="download">
          导出vue文件
        </el-button>
        <el-button class="copy-btn-main" icon="el-icon-document-copy" type="text" @click="copy">
          复制代码
        </el-button>
        <el-button class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
          清空
        </el-button>
      </div>

      <!-- 中间，表单项 -->
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form :size="formConf.size" :label-position="formConf.labelPosition"
            :disabled="formConf.disabled" :label-width="formConf.labelWidth + 'px'">
            <draggable class="drawing-board" :list="drawingList" :animation="340"
              group="componentsGroup">
              <draggable-item v-for="(item, index) in drawingList" :key="item.renderKey"
                :drawing-list="drawingList" :current-item="item" :index="index"
                :active-id="activeId" :form-conf="formConf" @activeItem="activeFormItem"
                @copyItem="drawingItemCopy" @deleteItem="drawingItemDelete" />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <!-- 右边：组件属性/表单属性 -->
    <right-panel :active-data="activeData" :form-conf="formConf" :show-field="!!drawingList.length"
      @tag-change="tagChange" @fetch-data="fetchData" :drawingList="drawingList" />

    <form-drawer :visible.sync="drawerVisible" :form-data="formData" size="100%"
      :generate-conf="generateConf" />

    <json-drawer size="60%" :visible.sync="jsonDrawerVisible" :json-str="JSON.stringify(formData)"
      @refresh="refreshJson" />

    <code-type-dialog :visible.sync="dialogVisible" title="选择生成类型" :show-file-name="showFileName"
      @confirm="generate" />
    <input id="copyNode" type="hidden" />
  </div>
</template>

<script>
import draggable from "vuedraggable";
import { debounce } from "throttle-debounce";
import { saveAs } from "file-saver";
import ClipboardJS from "clipboard";
import render from "@/components/render/render";
import { setObjectValueReduce, fetchData } from "@/components/render/util";
import FormDrawer from "@/views/infra/build/FormDrawer";
import JsonDrawer from "@/views/infra/build/JsonDrawer";
import RightPanel from "@/views/infra/build/RightPanel";
import {
  inputComponents,
  selectComponents,
  layoutComponents,
  formConf,
} from "@/components/generator/config";
import { beautifierConf, titleCase, deepClone } from "@/utils";
import {
  makeUpHtml,
  vueTemplate,
  vueScript,
  cssStyle,
} from "@/components/generator/html";
import { makeUpJs } from "@/components/generator/js";
import { makeUpCss } from "@/components/generator/css";
import drawingDefalut from "@/components/generator/drawingDefalut";
import logo from "@/assets/logo/logo.png";
import CodeTypeDialog from "@/views/infra/build/CodeTypeDialog";
import DraggableItem from "@/views/infra/build/DraggableItem";
import {
  getDrawingList,
  saveDrawingList,
  getIdGlobal,
  saveIdGlobal,
  getFormConf,
} from "@/utils/db";
import loadBeautifier from "@/utils/loadBeautifier";
import { CommonStatusEnum } from "@/utils/constants";
import { createForm, getForm, updateForm } from "@/api/bpm/form";
import { decodeFields, setDefaultConfig } from "@/utils/formGenerator";
import { DICT_TYPE, getDictDatas } from "@/utils/dict";

import {
  label2PinYin,
  setUnique,
} from "../../../views/infra/build/utils/label2PinYin";

let beautifier;
const emptyActiveData = { style: {}, autosize: {} };
let oldActiveId;
let tempActiveData;
const drawingListInDB = getDrawingList();
const formConfInDB = getFormConf();
const idGlobal = getIdGlobal();

export default {
  components: {
    draggable,
    render,
    FormDrawer,
    JsonDrawer,
    RightPanel,
    CodeTypeDialog,
    DraggableItem,
  },
  data() {
    return {
      logo,
      idGlobal,
      formConf,
      inputComponents,
      selectComponents,
      layoutComponents,
      labelWidth: 100,
      // drawingList: drawingDefalut,
      drawingData: {}, // 生成后的表单数据
      activeId: drawingDefalut[0].__config__.formId,

      drawingList: [], // 表单项的数组
      // activeId: undefined,
      // activeData: {},

      drawerVisible: false,
      formData: {},
      dialogVisible: false,
      jsonDrawerVisible: false,
      generateConf: null,
      showFileName: false,
      activeData: drawingDefalut[0], // 右边编辑器激活的表单项
      saveDrawingListDebounce: debounce(340, saveDrawingList),
      saveIdGlobalDebounce: debounce(340, saveIdGlobal),
      leftComponents: [
        {
          title: "输入型组件",
          list: inputComponents,
        },
        {
          title: "选择型组件",
          list: selectComponents,
        },
        {
          title: "布局型组件",
          list: layoutComponents,
        },
      ],
      categoryDictDatas: getDictDatas(DICT_TYPE.BPM_MODEL_CATEGORY), //流程分类可选数据

      // 表单参数
      form: {
        status: CommonStatusEnum.ENABLE,
        category: "1",
      },
      // 表单校验
      rules: {
        name: [{ required: true, message: "表单名不能为空", trigger: "blur" }],
        status: [
          { required: true, message: "开启状态不能为空", trigger: "blur" },
        ],
        category: [
          { required: true, message: "表单类别不能为空", trigger: "change" },
        ],
      },
    };
  },
  computed: {
    keyFields() {
      // return this.drawingList.map(item => item.__vModel__) || []
      const keys = [];
      for (let i = 0; i < this.drawingList.length; i++) {
        const { __vModel__, __config__ } = this.drawingList[i];
        if (!["rowFormItem", "unLinkageRow"].includes(__config__.layout)) {
          keys.push(__vModel__);
        }
      }
      return keys;
    },
  },
  /* 全局配置信息 */
  provide() {
    return {
      formConf: this.formConf,
    };
  },
  watch: {
    // eslint-disable-next-line func-names
    "activeData.__config__.label": function (val, oldVal) {
      if (
        this.activeData.placeholder === undefined ||
        !this.activeData.__config__.tag ||
        oldActiveId !== this.activeId
      ) {
        return;
      }
      this.activeData.placeholder =
        this.activeData.placeholder.replace(oldVal, "") + val;
    },
    activeId: {
      handler(val) {
        oldActiveId = val;
      },
      immediate: true,
    },
    drawingList: {
      handler(val) {
        this.saveDrawingListDebounce(val);
        if (val.length === 0) this.idGlobal = 100;
      },
      deep: true,
    },
    idGlobal: {
      handler(val) {
        this.saveIdGlobalDebounce(val);
      },
      immediate: true,
    },
  },
  mounted() {
    // 【add by 芋道源码】不读缓存
    // if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
    //   this.drawingList = drawingListInDB
    // } else {
    //   this.drawingList = drawingDefalut
    // }
    // this.activeFormItem(this.drawingList[0])
    // if (formConfInDB) {
    //   this.formConf = formConfInDB
    // }
    loadBeautifier((btf) => {
      beautifier = btf;
    });
    const clipboard = new ClipboardJS("#copyNode", {
      text: (trigger) => {
        const codeStr = this.generateCode();
        this.$notify({
          title: "成功",
          message: "代码已复制到剪切板，可粘贴。",
          type: "success",
        });
        return codeStr;
      },
    });
    clipboard.on("error", (e) => {
      this.$message.error("代码复制失败");
    });
  },
  created() {
    // 读取表单配置
    const formId = this.$route.query && this.$route.query.formId;
    if (formId) {
      getForm(formId).then((response) => {
        const data = response.data;
        this.form = {
          id: data.id,
          name: data.name,
          status: data.status,
          remark: data.remark,
          category: data.category,
        };
        this.formConf = JSON.parse(data.conf) || formConf;
        this.drawingList = decodeFields(data.fields);
        // 设置激活的表单项
        this.activeData = this.drawingList[0] || drawingDefalut[0];
        this.activeId = this.activeData.__config__.formId;
        // 设置 idGlobal，避免重复
        this.idGlobal += this.drawingList.length;
      });
    }
  },
  methods: {
    /* setObjectValueReduce(obj, strKeys, data) {
      const arr = strKeys.split('.')
      arr.reduce((pre, item, i) => {
        if (arr.length === i + 1) {
          pre[item] = data
        } else if (!isObjectObject(pre[item])) {
          pre[item] = {}
        }
        return pre[item]
      }, obj)
    }, */
    /* setRespData(component, resp) {
      const { dataPath, renderKey, dataConsumer } = component.__config__
      // if (!dataPath || !dataConsumer) return
      // const respData = dataPath.split('.').reduce((pre, item) => pre[item], resp)
      // 当 dataPath 为空时， 直接取 response.data，此时的数据格式就是想要的数据
      if (!dataConsumer) return
      let respData = resp;
      if (dataPath) {
        respData = dataPath.split('.').reduce((pre, item) => pre[item], resp)
      }

      // 将请求回来的数据，赋值到指定属性。
      // 以el-tabel为例，根据Element文档，应该将数据赋值给el-tabel的data属性，所以dataConsumer的值应为'data';
      // 此时赋值代码可写成 component[dataConsumer] = respData；
      // 但为支持更深层级的赋值（如：dataConsumer的值为'options.data'）,使用setObjectValueReduce
      this.setObjectValueReduce(component, dataConsumer, respData)
      const i = this.drawingList.findIndex(item => item.__config__.renderKey === renderKey)
      if (i > -1) this.$set(this.drawingList, i, component)
    }, */
    fetchData(component) {
      /* const { dataType, method, url } = component.__config__
      if (dataType === 'dynamic' && method && url) {
        this.setLoading(component, true)
        this.$axios({
          method,
          url
        }).then(resp => {
          this.setLoading(component, false)
          this.setRespData(component, resp)
        })
      } */
      const { renderKey } = component.__config__;
      fetchData.call(this, component, (newComponent) => {
        const i = this.drawingList.findIndex(
          (item) => item.__config__.renderKey === renderKey
        );
        if (i > -1) this.$set(this.drawingList, i, newComponent);
      });
    },
    /* setLoading(component, val) {
      const { directives } = component
      if (Array.isArray(directives)) {
        const t = directives.find(d => d.name === 'loading')
        if (t) t.value = val
      }
    }, */
    activeFormItem(currentItem) {
      this.activeData = currentItem;
      this.activeId = currentItem.__config__.formId;
    },
    onEnd(obj) {
      if (obj.from !== obj.to) {
        this.fetchData(tempActiveData);
        this.activeData = tempActiveData;
        this.activeId = this.idGlobal;
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item);
      this.fetchData(clone);
      this.drawingList.push(clone);
      this.activeFormItem(clone);
    },
    cloneComponent(origin) {
      const clone = deepClone(origin);
      const config = clone.__config__;
      config.span = this.formConf.span; // 生成代码时，会根据span做精简判断
      clone.placeholder !== undefined && (clone.placeholder += config.label);
      tempActiveData = this.createIdAndKey(clone);
      return tempActiveData;
    },
    createIdAndKey(item) {
      const config = setDefaultConfig(item.__config__);
      item.__config__ = config; // 避免丢失默认的配置项
      config.formId = ++this.idGlobal;
      config.renderKey = `${config.formId}${+new Date()}`; // 改变renderKey后可以实现强制更新组件
      if (config.layout === "colFormItem") {
        // item.__vModel__ = `field${this.idGlobal}`
        if (!item.__vModel__) {
          item.__vModel__ = label2PinYin(item.__config__.label, this.keyFields);
        } else {
          item.__vModel__ = setUnique(
            item.__vModel__,
            this.keyFields,
            item.__config__.vModel
          );
        }
      } else if (["rowFormItem", "unLinkageRow"].includes(config.layout)) {
        config.componentName = `${config.label}${this.idGlobal}`;
        !Array.isArray(config.children) && (config.children = []);
        delete config.label; // rowFormItem无需配置label属性
      }
      if (Array.isArray(config.children)) {
        config.children = config.children.map((childItem) =>
          this.createIdAndKey(childItem)
        );
      }
      return item;
    },
    // 获得表单数据
    AssembleFormData() {
      const fields = this.drawingList.map((item) => {
        if (item.__config__.dataType === "dynamic") {
          setObjectValueReduce(item, item.__config__.dataConsumer, []); // 动态数据，不需要保存当前数据，后续渲染通过接口获取，避免存储不必要的大量数据
        }
        return deepClone(item);
      });
      this.formData = {
        fields,
        ...this.formConf,
      };
    },
    // 校验数据库字段的重复性
    hasSameKey() {
      const newkeys = [...this.keyFields];
      const keySet = new Set(newkeys);
      return keySet.size !== newkeys.length;
    },
    save() {
      if (this.hasSameKey()) {
        this.$message.error("字段名不能重复");
        return;
      }
      // this.AssembleFormData()
      // console.log(this.formData)
      this.$refs["form"].validate((valid) => {
        if (!valid) {
          return;
        }
        const form = {
          conf: JSON.stringify(this.formConf), // 表单配置
          fields: this.encodeFields(), // 表单项的数组
          ...this.form, // 表单名等
        };
        // 修改的提交
        if (this.form.id != null) {
          updateForm(form).then((response) => {
            this.$modal.msgSuccess("修改成功");
            this.close();
          });
          return;
        }
        // 添加的提交
        createForm(form).then((response) => {
          this.$modal.msgSuccess("新增成功");
          this.close();
        });
      });
    },
    /** 关闭按钮 */
    close() {
      this.$tab.closeOpenPage({ path: "/bpm/manager/form" });
    },
    encodeFields() {
      const fields = [];
      this.drawingList.forEach((item) => {
        if (item.__config__.dataType === "dynamic") {
          setObjectValueReduce(item, item.__config__.dataConsumer, []); // 动态数据，不需要保存当前数据，后续渲染通过接口获取，避免存储不必要的大量数据
        }
        fields.push(JSON.stringify(item));
      });
      return fields;
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`];
      this.generateConf = data;
      func && func(data);
    },
    execRun(data) {
      this.AssembleFormData();
      this.drawerVisible = true;
    },
    execDownload(data) {
      const codeStr = this.generateCode();
      const blob = new Blob([codeStr], { type: "text/plain;charset=utf-8" });
      saveAs(blob, data.fileName);
    },
    execCopy(data) {
      document.getElementById("copyNode").click();
    },
    empty() {
      this.$confirm("确定要清空所有组件吗？", "提示", { type: "warning" }).then(
        () => {
          this.drawingList = [];
          this.idGlobal = 100;
        }
      );
    },
    drawingItemCopy(item, list) {
      let clone = deepClone(item);
      clone = this.createIdAndKey(clone);
      list.push(clone);
      this.activeFormItem(clone);
    },
    drawingItemDelete(index, list) {
      list.splice(index, 1);
      this.$nextTick(() => {
        const len = this.drawingList.length;
        if (len) {
          this.activeFormItem(this.drawingList[len - 1]);
        }
      });
    },
    generateCode() {
      const { type } = this.generateConf;
      this.AssembleFormData();
      const script = vueScript(makeUpJs(this.formData, type));
      const html = vueTemplate(makeUpHtml(this.formData, type));
      const css = cssStyle(makeUpCss(this.formData));
      return beautifier.html(html + script + css, beautifierConf.html);
    },
    showJson() {
      this.AssembleFormData();
      this.jsonDrawerVisible = true;
    },
    download() {
      this.dialogVisible = true;
      this.showFileName = true;
      this.operationType = "download";
    },
    run() {
      this.dialogVisible = true;
      this.showFileName = false;
      this.operationType = "run";
    },
    copy() {
      this.dialogVisible = true;
      this.showFileName = false;
      this.operationType = "copy";
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag);
      const config = newTag.__config__;
      newTag.__vModel__ = this.activeData.__vModel__;
      config.formId = this.activeId;
      config.span = this.activeData.__config__.span;
      this.activeData.__config__.tag = config.tag;
      this.activeData.__config__.tagIcon = config.tagIcon;
      this.activeData.__config__.document = config.document;
      if (
        typeof this.activeData.__config__.defaultValue ===
        typeof config.defaultValue
      ) {
        config.defaultValue = this.activeData.__config__.defaultValue;
      }
      Object.keys(newTag).forEach((key) => {
        if (this.activeData[key] !== undefined) {
          newTag[key] = this.activeData[key];
        }
      });
      this.activeData = newTag;
      this.updateDrawingList(newTag, this.drawingList);
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex(
        (item) => item.__config__.formId === this.activeId
      );
      if (index > -1) {
        list.splice(index, 1, newTag);
      } else {
        list.forEach((item) => {
          if (Array.isArray(item.__config__.children))
            this.updateDrawingList(newTag, item.__config__.children);
        });
      }
    },
    refreshJson(data) {
      this.drawingList = deepClone(data.fields);
      delete data.fields;
      this.formConf = data;
    },
  },
};
</script>

<style lang="scss">
@import "@/styles/home";
</style>
